what is the difference between b and c?

Hi @Olivia-Cohen, Happy to help! Answer choice (B) is incorrect because neither passage discusses individual researchers' desires. Passage A discusses the "recent tendency to treat research findings as commodities" which, in some cases, has led to "a reduction in the free sharing of research methods and results" (lines 4 to 6; 21 to 24). Passage B discusses the transformation of a public good (i.e. "the fruits of pure science") into a market commodity (lines 32 to 41). In this way, both passages discuss the effects of commercial enterprises on scientific research. Neither discusses the influence of the desires of individual researchers. Hope this helps! Please let us know if you have any further questions.

thank you!